.arch-section{
    width:100%;
    background:#ffffff;
    padding:70px 30px;
}
.arch-section .container{
    max-width:1550px;
    margin:0 auto;
}
.arch-section .title{
    text-align:center;
    font-size:48px;
    color:#222;
    margin-bottom:50px;
    opacity:0;
    animation:arch-titleAnim 1.4s ease forwards;
}
.arch-section .img-box{
    width:100%;
    opacity:0;
    transform:translateY(50px);
    animation:arch-imgUp 1s ease forwards;
}
.arch-section .img-box img{
    width:100%;
    height:auto;
    display:block;
}

@keyframes arch-titleAnim{
    0%{opacity:0;letter-spacing:-3px;transform:translateY(10px);}
    100%{opacity:1;letter-spacing:0;transform:translateY(0);}
}
@keyframes arch-imgUp{
    to{opacity:1;transform:translateY(0);}
}